CN201025041Y

CN201025041Y - External injection monomer hydraulic pressure supporting pole

Info

Publication number: CN201025041Y
Application number: CNU2007200355112U
Authority: CN
Inventors: 陶宾; 张江平; 刘巍
Original assignee: Huaibei Xinweiye Precision Cylinder Products Co Ltd
Current assignee: Huaibei Xinweiye precision cylinder products Co. Ltd.
Priority date: 2007-03-29
Filing date: 2007-03-29
Publication date: 2008-02-20
Anticipated expiration: 2017-03-29

Abstract

The utility model discloses an outer pouring type sing hydraulic pressure strut. A sealing cover is arranged between the top cover and the movable strut; at least three radially distributed spring column pins are connected with the top cover on the upper part of the sealing cover; the lower part of the sealing cover is sealed and welded with the upper end of the movable strut; a handle is arranged at the upper end cylinder mouth of an oil cylinder; the upper part of the handle mutually slides with movable strut through a dust proof ring and a guiding ring; the lower part of the handle is connected with the cylinder mouth of the oil cylinder through a connecting steel wire; a valve seat is arranged on the column surface of the oil cylinder at the downward side of the handle; a three-function valve is arranged in the valve seat; pressure liquid enters the cavity of the oil cylinder through the three-function valve, a high pressure oil tube and a base liquid inlet; a sealing closing ring, an oil seal and an oil seal lining ring which are all sealed and matched with the cavity of the oil cylinder are arranged at the lower end mouth of the movable strut. The utility model has the advantages of high intensity and convenient operation as well as effectively preventing the strut from leaking liquid, which can be widely used for the supporting of underground exploitation and the supporting of over-ground special project.

Description

Outside injection type hydraulic pillar

Affiliated technical field

The utility model relates to a kind of mining support apparatus, specifically a kind of outside injection type hydraulic pillar.

Background technology

Hydraulic prop is the high-grade supporting support apparatus of colliery conventional face.Because energy shortage, the coal mining amount continues to increase, and the requirement of the annual outside injection type hydraulic pillar of China surpasses 1,000,000, and simultaneously, also nearly 300,000 of year learies of pillar.

Domestic at present widely used be the piston hydraulic single prop that China introduces from foreign country nineteen seventies.This hydraulic prop mainly is made up of top cover, live post lengthening section, column cap, plunger tube, piston, oil cylinder, base, handgrip body, triple-use valve, back-moving spring etc.Top cover covers on the post lengthening section top of living and also is connected with it with elastic cylindrical pin, the upper end welding of the bottom of the post lengthening section of living and column cap, and post alive has so just been made up in the lower end of column cap and plunger tube welding.The lower port of post alive is equipped with piston, establish a plurality of ladders on the outer wall of this piston, be processed with on the ladder sealing ring, guide ring and the groove that is connected steel wire are installed, the center of piston is an axially extending bore, the upper end of this piston is bumped into the lower end inwall of plunger tube by sealing ring, and with connecting the steel wire connection, the lower end of piston is by guide ring and y-shaped ring and oil cylinder inner wall sealing.Triple-use valve is installed in the column cap, is surrounded as the cavity of a sealing by triple-use valve, column cap, the post of living, oil cylinder, base, and cavity becomes the big post of living and raises, and the cavity post alive that diminishes reduces.Back-moving spring hangs on the link on the hook of column cap bottom and base top, vertically stretching with the post of living.The triple-use valve of this hydraulic prop is installed on the column cap, and triple-use valve raises with the post of living, and makes the workman operate inconvenience.Simultaneously, owing to have column cap and top cover, column cap and the welding of plunger tube two places on the post of living and on the post column cap of living, be provided with Ф 42 axially extending bores that assemble triple-use valve, weakened the intensity of post alive greatly; Because the position of above-mentioned two places welding is far away apart from the pressure-bearing point of top cover, be easy in the weld fracture of two places.Secondly, sealing ring, guide ring are installed and are concentrated on the piston, make processing request height, the difficulty of processing of piston big with the groove part that is connected steel wire.

A kind of apply at home, floated pillar that essence is outside injection type hydraulic pillar, the handgrip body is located between oil cylinder upper port and the post alive, triple-use valve is installed in the handgrip body, solve above-mentioned old-fashioned pillar triple-use valve column cap and be welded on the post alive, caused post intensity alive to reduce and the unhandy problem of workman.But this pillar is between top cover and post alive, employing connection steel wire is connected with sealing ring and seals, because this position stressing conditions of top cover is very complicated, therefore, such connection and sealing means are easy in the top cover and the leakage between the post of living, even the Baltimore groove distortion that connects steel wire is installed, cause top cover to come off, pillar thoroughly leaks.In addition, this pillar is located at the handgrip body of oil cylinder upper port, with connecting steel wire, sealing ring with oil cylinder connection and sealing, with dust ring, sealing ring, guide collar and live sealing and relative slip between the cylinder, because the handgrip body is stressed or collided in handling process, and the post alive surface easy corrosion in the down-hole that is used to seal, cause the place's seal failure of oil cylinder upper port.The deficiencies such as oil cylinder cylinder mouth place's leakage that the top cover that this pillar exists and the leakage between the post of living, top cover come off, cooperate with the handgrip body are confirmed by production practices.

Summary of the invention

The purpose of this utility model provides a kind of outside injection type hydraulic pillar, this pillar post intensity height not only alive, and the operation triple-use valve is convenient, and can prevent the generation of the phenomenon of leakage.

For achieving the above object, the technical scheme that the utility model is taked is: this outside injection type hydraulic pillar comprises top cover, live post, oil cylinder, base, handgrip body, valve seat, triple-use valve, and the lower end of oil cylinder is connected the sealing of steel wire and base by the base sealing ring and links together with base.Between top cover and post alive, be provided with a seal cover, the top middle part of sealing lid has a groove, the top of seal cover is connected with top cover with the spring straight pin of three radial equipartitions at least, be installed in the top endoporus of post alive its underpart liquid sealing, one shoulder is arranged, seal welding between the upper surface of the lower surface of this shoulder and the post of living on the external cylindrical surface of seal cover.The handgrip body is arranged on the cylinder mouth place, upper end of oil cylinder, and the top of this handgrip body links together by the cylinder mouth that connects steel wire and oil cylinder with the relative slip between the post of living, its underpart by dust ring, guide collar.Valve seat is installed on the oil cylinder external cylindrical surface of handgrip body below with snap ring, lock-screw, and triple-use valve is installed in the valve seat.Vertical lower at valve seat has the step hole, and base has connecting hole in the position in relative this step hole, and this connecting hole is communicated with the inner chamber of oil cylinder by the base inlet opening.The snap joint of high-pressure oil pipe one end is inserted in the step hole by sealing ring, and lives with " U " shape kayser; The snap joint of the high-pressure oil pipe other end is installed in the connecting hole of base by sealing ring, and lives with " U " shape kayser.In the post lower port of living a cylinder less than the plunger tube external diameter is arranged, Sealing shield ring, oil sealing, oil sealing lining ring and location snap ring are housed on this cylindrical cylindrical from top to bottom successively, a Baltimore groove is arranged on the external cylindrical surface of Sealing shield ring, and groove is embedded with guide ring.The radial direction through hole that is communicated with live post inner chamber and cylinder cavity is opened on the post sidewall alive of snap ring below, location.

The utility model since triple-use valve be installed in the valve body on the oil cylinder external cylindrical surface, and the welding position of seal cover and plunger tube is near apart from the pressure-bearing point of top cover, the commissure is stressed little, not easy to crack, therefore solve old-fashioned pillar the triple-use valve column cap has been welded on the problem that influences the post intensity of living on the post alive, improved the overall performance of pillar.Simultaneously, be positioned on the oil cylinder external cylindrical surface below the handgrip body owing to the valve seat of triple-use valve is installed is with fixing snap ring, triple-use valve is the lifting with the flexible of the post of living not, even the pillar cylinder mouth of different size is apart from the height difference on ground, also can be arranged on the height place that is fit to workman's operation to valve seat, so the utility model is than the more convenient workman's operation of old-fashioned pillar.In addition, because the mode of the seal cover and the employing welding between the post of living seals, the sealing station of post alive and oil cylinder is in the lower end of post alive rather than in stressed oil cylinder upper port, therefore the utility model is compared with existing floated pillar, have better sealing and stability, thereby effectively avoided the generation of the hydraulic prop phenomenon of leakage in the use.

Description of drawings

The utility model is described in further detail below in conjunction with drawings and Examples.

Fig. 1 is a full sectional view of the present utility model.

Fig. 2 is an external view of the present utility model.

Fig. 3 is that the A of Fig. 1 is to partial sectional view.

Fig. 4 is the partial enlarged view at B place in position among Fig. 1.

The specific embodiment

As shown in Figure 1 and Figure 2, the utility model outside injection type hydraulic pillar comprises top cover 18, seal cover 20, live post 10, oil cylinder 9, base 1, handgrip body 21, valve seat 23, triple-use valve 24, back-moving spring 22, between top cover 18 and post 10 alive, be provided with a seal cover 20, back-moving spring 22 hangs on the link on the hook of seal cover 20 bottoms and base 1 top, vertically stretching with the post of living.The top middle part of seal cover 20 has a groove 17, is not used for the installation of rivet 16 of riveted bascule 15 so that do not influence top cover 18 centers, the seal cover 20 that disintegrates simultaneously during with top cover 18 spring straight pin 19 enough spaces of giving up the throne are arranged; The top of seal cover 20 is connected with top cover 18 with the spring straight pin 19 of three radial equipartitions at least, be installed in the top endoporus of post 10 alive its underpart liquid sealing, one shoulder 14 is arranged, seal welding between the upper surface of the lower surface of this shoulder 14 and the post 10 of living on the external cylindrical surface of seal cover 20.Preferably as shown in Figure 1, respectively offering a bevel for welding on the cylindrical of capital end of living and on the cylindrical of seal cover shoulder lower end, during welding to strengthen weld strength.Handgrip body 21 is arranged on the cylinder mouth place, upper end of oil cylinder 9, and the top of this handgrip body 21 is by dust ring 13, guide collar 12 and the relative slip between the post 10 of living, and its underpart links together by the cylinder mouth that connects steel wire 11 and oil cylinder 9; The lower end of oil cylinder 9 is connected steel wire 5 and base 1 sealing by base sealing ring 3 and links together with base.

As Fig. 1, Fig. 2, shown in Figure 3, valve seat 23 usefulness snap rings 37, lock-

screw

35,36 are installed on the oil cylinder external cylindrical surface of handgrip body 21 belows, and triple-use valve 24 is installed in the valve seat 23.As Fig. 1, Fig. 3, shown in Figure 4, have step hole 25 in the vertical lower of valve seat 23, base 1 has connecting hole 32 in the position in step hole 25 relatively, and this connecting hole 32 is communicated with the inner chamber of oil cylinder 9 by base inlet opening 33.The snap joint of high-pressure oil pipe 28 1 ends is inserted in the step hole 25 by sealing ring 26, and pins with " U " shape card 27; The snap joint of the high-pressure oil pipe other end is installed in the connecting hole 32 of base 1 by sealing ring 31, and pins with " U " shape card 30.

As shown in Figure 1, stroke limit ring 29 is housed, carries out spacing the stroke of the post of living in post 10 middle and lower parts of living.As Fig. 1, shown in Figure 4, in post 10 lower port of living a cylinder less than the plunger tube external diameter is arranged, Sealing shield ring 8, oil sealing 6, oil sealing lining ring 4 and location snap ring 2 are housed on this cylindrical cylindrical from top to bottom successively, a Baltimore groove is arranged on the external cylindrical surface of Sealing shield ring 8, and groove is embedded with guide ring 7.The radial direction through hole 34 that is communicated with live post inner chamber and cylinder cavity is opened on the post sidewall alive of snap ring 2 belows, location.

The utility model is to improve to form on old-fashioned stanchion base, it is surrounded as the cavity of a sealing by seal cover 20, the post 10 of living, oil cylinder 9, base 1, high-pressure oil pipe 28, triple-use valve 24, valve seat 23, during the pillar pressure-bearing, pressure fluid enters the inner chamber of the inlet opening 33 injection oil cylinders of oil cylinder sidewall through triple-use valve 24, along high-pressure oil pipe 28, the post of living raises, and realizes the pressure-bearing work of pillar; During unloading, open the feather valve on the triple-use valve 24, pressure fluid releases, and pillar can be resetted by back-moving spring 22.Pillar has just been finished a working cycles like this.

Claims

1. outside injection type hydraulic pillar, comprise top cover (18), post (10) alive, oil cylinder (9), base (1), handgrip body (21), valve seat (23), triple-use valve (24), the lower end of oil cylinder (9) is connected steel wire (5) and base (1) by base sealing ring (3) and seals and link together with base, it is characterized in that:

Between top cover (18) and post alive (10), be provided with a seal cover (20), the top middle part of seal cover (20) has a groove (17), the top of seal cover (20) is connected with top cover (18) with the spring straight pin (19) of three radial equipartitions at least, be installed in the top endoporus of post alive (10) its underpart liquid sealing, one shoulder (14) is arranged, seal welding between the upper surface of the lower surface of this shoulder (14) and the post (10) of living on the external cylindrical surface of seal cover (20);

Handgrip body (21) is arranged on the cylinder mouth place, upper end of oil cylinder (9), the top of this handgrip body (21) is by dust ring (13), guide collar (12) and the relative slip between the post (10) of living, and its underpart links together by the cylinder mouth that connects steel wire (11) and oil cylinder (9);

Valve seat (23) is installed on the oil cylinder external cylindrical surface of handgrip body (21) below with snap ring (37), lock-screw (35,36), and triple-use valve (24) is installed in the valve seat (23); Vertical lower at valve seat (23) has step hole (25), and base (1) has connecting hole (32) in the position in relative step hole (25), and this connecting hole (32) is communicated with the inner chamber of oil cylinder (9) by base inlet opening (33); The snap joint of high-pressure oil pipe (28) one ends is inserted in the step hole (25) by sealing ring (26), and pins with " U " shape card (27); The snap joint of high-pressure oil pipe (28) other end is installed in the connecting hole (32) of base (1) by sealing ring (31), and pins with " U " shape card (30);

In post (10) lower port of living a cylinder less than the plunger tube external diameter is arranged, Sealing shield ring (8), oil sealing (6), oil sealing lining ring (4) and location snap ring (2) are housed on this cylindrical cylindrical from top to bottom successively, a Baltimore groove is arranged on the external cylindrical surface of Sealing shield ring (8), and groove is embedded with guide ring (7);

The radial direction through hole (34) that is communicated with live post inner chamber and cylinder cavity is opened on the post sidewall alive of location snap ring (2) below.